Indoor SF6 Switch-Disconnectors (Up to 36kV )

Property Specification

  • Type: Medium-Voltage Indoor SF6-Insulated Switch-Disconnector (Up to 36 kV)

  • Features: Modular, expandable design compliant with regulatory standards and adaptable for future panel expansions, control additions, and condition monitoring. Active interruption and earthing components are housed in a maintenance-free, hermetically sealed-for-life SF6 enclosure for high electrical switching endurance. Operating mechanisms are engineered for minimal upkeep under standard environmental conditions. Features a compact, space-optimized form factor with reduced dimensions and lightweight build to minimize switchboard envelope requirements, while streamlining busbar and cable termination connections.

  • Applications: Indoor medium-voltage switchboards, distribution cubicles, primary/secondary distribution networks, and power infrastructure applications up to 36 kV requiring compact, low-maintenance load-break switching and earthing solutions.

Description

Technical Product Range & Performance Matrix

Technical Parameter / Feature Category Medium-Voltage Disconnector Specifications
Nominal Operating Voltage Class 7.2 kV, 12 kV, 17.5 kV, 24 kV, 36 kV
Power Frequency Withstand Voltage (50 Hz, 1 min)

• Insulation: 20 kV (7.2 kV), 28 kV (12 kV), 38 kV (17.5 kV), 50 kV (24 kV), 70 kV (36 kV)

• Isolation: 23 kV (7.2 kV), 32 kV (12 kV), 45 kV (17.5 kV), 60 kV (24 kV), 80 kV (36 kV)

Lightning Impulse Withstand Voltage (1.2/50 µs Peak)

• Insulation: 60 kV (7.2 kV), 75 kV (12 kV), 95 kV (17.5 kV), 125 kV (24 kV), 170 kV (36 kV)

• Isolation: 70 kV (7.2 kV), 85 kV (12 kV), 110 kV (17.5 kV), 195 kV (36 kV)

Short-Time Withstand Current & Rating (1s)

• 12.5 kA (630 A to 1250 A for 7.2–24 kV)

• 16 kA (630 A to 1250 A for 7.2–24 kV)

• 20 kA (630 A to 1250 A for 7.2–24 kV)

• 25 kA (630 A to 1250 A for 7.2–24 kV; 1250 A for 36 kV)

Peak Dynamic Making Capacity 2.5 times the rated short-time withstand current
Mechanical Endurance Rating 1,000 operations 
Storage Temperature Limits -40°C to +70°C (dry, dust-free environment with minimal thermal fluctuations)
Operating Temperature Limits -5°C to +40°C